<!DOCTYPE html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
 </head>
 <body>
  <script>
   var day=new Date().getDay();
    switch (day)
    {
    case 0:
      x="今天是周日";
      break;
    case 1:
      x="今天是周一";
      break;
    case 2:
      x="今天是周二";
      break;
    case 3:
      x="今天是周三";
      break;
    case 4:
      x="今天是周四";
      break;
    case 5:
      x="今天是周五";
      break;
    case 6:
      x="今天是周六";
      break;
    }
    document.write(x);

  </script>
 </body>
</html>
